Percussion-tool



W.H. KELLER AND A. SGHINKEZ.

` P'ERcussloN TooL. y APPLICATION FILED JUNE I'Tl I9I8.

@WQ/w@ Y The object of theinvention4 thus generally UNI-TED sTATEs P WILLIAM II. KELLER AND ALBERT ,scnINKnz"or VefItANn AssIGNons 'ro KELLER `rNnUMAtI'Ic To'oL.COMPANILE GRANDHAVEN e MICHIGAN, AooRPoRATIoN or MICHIGAN-, j g. l p

.PERCUSSION-'moon .i Y

i a citizen ofxthe United States, residing at Grand Haven, in the county of Ottawa and" Stateof Michigan, and ALBERT SCHINKE@ a subjectofthe Emperor of Austria, residing at Grrand `Haven,y inthe county ofV Ottawa therefor; and the object of the invention is 'n set in operative position intheyforward end to provide a device of a very practical character `which will effective-ly retainy a rivet `of a toolbody and which isfreadily operable the rivet.v set whenY desired? without removal fromthe body 'to ,release y stated, together with other and-ancillary ad- Vso.

vantages, is. attained by the construction andvarrangement illustrated inv the accompanyin drawings, forming lpart hereof,` in which iigure l' is a longitudinalfsectional viewv-through the forward end of-apneumatic hammer embodying .the features vof our inyention', showing theparts y1n retain@ 'l ing.r or closed-position, theview being` taken online 1-l.of Fig. 2. AFigl-2 is a front endelevation of the tool with theparts the position `shown in: Fig. l. Fig. 3 isa lonL ing or open position, theview being taken on( k gitudinal sectional .view through the fore wardend of atoolf withfthe' parts in releasline 3*-'3 of Fig. 4.. Fig'l 4c isa front endelevation of the tool ywith the tion; shown in Fig. 3. y ,Y p

- In the drawings,1 indicates the body of a pneumatic hammer havingfa rivet set 2 in parts inthe posha its forward end. -Theham1ner bodymay be,

of-any preferred construction, and the rivet set comprises` a shank 3, ahead 4,V andan i n termediate flange or shoulder 5. The hammer body is -providedrwi'th alborej GfforiV the shank 3 andthe inward movement vof the set inV the body is limitedfby vthe shoulder 5 abutting 4against the` forward end of'v the bodyrl'.

' Thev fehahifis adaptedhhihha;thehunfward movement of the rivet setinlthejbody and comprises apluralty `pdf"r'nenibersl '7,

sp'eciatin'f Lettrhratent. Application-med June 17, 1918.l

Y v .f three; being Beit know-n that we, WILLIAMH. KELLER,

the path` Vof movement of ytliesho" u l p the' rivetiset so as to flijmfitthe outward mfove-Y.V ment of the-latter in`V the bdygj Preferably the members jv7 are made,ofsuehf"size that when Yhaha together-@thighs Jhhdyz they stantially surroundit andthe rear endsfjoff the members areeach'lprovidedwith anjin-fV wardly projecting' degli arranged .to jen#- 1 gage,.-a short distance rearwardly xfrorn the 'forwardendlof the tool .bod'yyv annular groove 12'pr`ovided'in the periph,iythereof.k .K l .The ,forwardg end of the toolbodyfistapered as at'y 13, and the Ymembers 7 arejjcorrespondf- `ingly shaped so as to'bearfupon such tapered? inthe p ath of movement of 4the shoulder5, on the rivet set. Y Rearwardl-y of thetapeifed surfacel 1 3 "at the forward edge ofthe groove l2 the body has anlannularbear surface 14 vupon vwhich the members 11, raised 1 sh 1)..;l It,Wi111.hefshhniuhh'the annular surface lserv'es rvasa "fu'lc'rurn upon whichtheilnembers 7 l and when the `rearfends` ofthe `members"7 are jmoved radiallyv inwardly A until'. thel inner surfacjesfofthe dogsfgllv' liev flat against the. botto'mljf: hhhgiroove iethedogs io at the forward ends yof* the v'meInb'ers are 5 inthe *poi* with` the rivetset.

are arranged toA roelv HAVEN; .MIHIGAN,y ,1,

surface 13-whi1e their `dogs l0 Qarejdi'sjposed `7 be ar"near their j rear ends with the inner surfabes of thedogs p glitly outfoflengageinent with 'theLbOdytFa i i sition showni" 3,"fout of engagement "i thenr` in; either their 4open or' 'closed'- position, that 1s tosay, either in position tore'tai'ny the rivet setV or in` position to .release the rivet 'set7 p we. ha`ve"provided the ,annular-ring 8 surrounding fthek membersff7 and" 'movable longitudinally i relative thereto'. l On H its o'pfpositefends -vthe "ring'isfyfprovided Within# ndibtt'he merite@ faire@ l nnulaebely ing surfaces 17 and 18 for the inner lsurfaces of the inturned portions 15 and 16. The forward ends of the concaved surfaces of the members 7 terminating in the raised surfaces 17 form cam surfaces 17 awithwhich the forward end of the ring 8 slidably engages as it is moved forwardly to force the forward ends of the members inwardly; and annular shoulders 19 and 20 are provided at the for# ward and rear ends respectively of the members to limit the longitudinal movement of the ring 8.

The parts are so proportioned and arranged that when the boss 15 at the forposition shown in Fig. 1 to movetheboss 16 at the rear end of the ring onto the sur-v face 18, rearwardly of thefulcrum 111, the

boss 15v atthe, forward eiidof the ring is quickly moved ofi' from the surface 17- and the rear ends of the members are forced radially inwardly. When the ring is Vagain moved forwardly the boss 15 rides up upon y the cam surface 17a of the members forcing Y when theboss 16 at the rear the dogs 10 inwardly and when the forwardv end of the ring rests upon the bearing surfaces 17 of the members 7, the dogs 10 are positively held by the ring in their innermost position in the path of movement of the shoulder 5 on the rivet set. Similarly,

as the ring is moved to its rearmost position, i

said members are rocked to move the dogs 10 outwardly, and the dogs 11 inwardly, `and rests upon the bearing surfaces 18.0f`the members 7, rearwardly of their fulcru'm 14, the dogs 11 are held soy that their inner s urfaces lie fiat against the bottom of the annu'- lar groove 12. It will be seen'that in the relatively short, movement ofthe ring 8 from its foremost to its rearmost positionand vice versa, the members 7 arerocked upon the annular bearing surface 14 asa fulcruin to movelthe dogs 10 either in or out of operative4 position, i but without lreleasing the dogs 11 fromengagement with thebody.

The snap spring 9 is adapted to yieldingly hold the ring 8 in either its foremost or rearmost position, as maybe desired.y To

this end the spring'is formed ofa short piece of spring wire/arranged .to lie in f a groove 21 formed in the outer surfaceof one of the members 7 Preferably, the forward end of the spring is fixed; in the member and its rear endA is bent to forma pro ijection'or hump 22. In the position of the 4operative position; rthe parts shown in Fig. 3, said hump en 'end ofthe ring parts shown in Fig. 2, it will be seen that the hump 22 engages with the rear end of the ring 8 to holdtlie-ringin its` foremost position whereby' to' retain the rivet set in and in tlievposition of gageswith vthe cam surfaces 17b at the rear end of said ring. i It will'be evident that we haveprovided a retaining device of a very practical char-Y acter in that it is readily operable from retaining to releasing position orvice versa without necessitating the removal or ,replacement o-f `any part or parts of the retainer.` Thus the operation of replacing a rivet set, in the vuse of theytool, `is Vgreatly facilitated. f Furthermore, by reason of the eXtreme simplicity in construction*andar! n rangement, thecost` ofiinanufacture` of the deviee'is jreduced to aminimum.' v

*IVVhile wehaveherein illustrated and jdescribed the invention with considerable par` ticularity, it willbe understoodthat we dov v not intend to be limited tothe construction and arrangement set forth exceptias may be necessitated by` thev stateof the priorart,

for ,obviously many changes mayk be `made 'l f in the device which are within the spirit and d scope of thexinvention.

i We" claim as ourv` invention:

1. In a pereussion'tool, fthe combination with arbarrel having aforward taperedV end and an. annular peripheral groove Frearwardly of saidtaper'ed end, `a tool mounted in said barrel'and having-'an annular-flange, a plurality of members fulc'rumed on the barrel at theforwardledge of said groove and each having at oneend a p`ortion'pr.0- jecting'into thepath of said tool :flange and at its'other end a vdog engaging insaid an'-` nular 'groove7 a ring for retaining` said meming annular bosses at'its opposite ends arrangedtoy engage respectively with the opposite ends of said members, said ring being` o'fa lengthy less thanthe lengthof the mem;

bers'upon'the forward end of the` barrelhavbersvso' as to bev movable longitudinally rela- 1 tive thereto and said members having recesses in their outerxfaces between theiropposite ends adapted to receive the boss on the forward end moved rearwardly thereof whereby to kpermit the forward ends of the members to be moved radially outward by the .boss'atwthe rear end "of the ring yengaging with theiear ends of: said. men'iloers.` i

ofthe `ring when the ring .is

2. In Aa percussionv tool, the icombination 'i with a barrel having aforward tapered end and -anV annular peripl'ieralsgroove rearwardly of said tapered end, a tool mounted in said barrel and having an annular flange,

a pluralityyof 'members fulcrumed Von the' barrel atfthe forward edge of said groove and each having atone end ya"`portion projecting into the path of said tool Hange at.its other end a dog engaging in said annular groove, a ring for retaining said mem-y bers upon the forward end of the barrelhaving annular bosses at its opposite ends ar ranged to engage respectively with the opposite ends of said members, said ring being of a length less than the length of the mem-k bers so as to be movable longitudinally relative thereto and saidmembers having reoesses in their outer faces between their opposite ends adapted to receive the boss on the forward end of the ring when the ring is moved rearwardly thereof whereby to'k rear ends of said members, one of said memf bers having a longitudinal groove therein,

.and a spring member lixed'in said groove and adapted to coact with the boss at the rear endl of the ring to hold the latter in either its forward or'its rear position.

yIn testimony whereof we have hereunto set our hands.

WILLIAM H. KELLER.V Y ALBERT SCHINKEZ. 

